Kelly Osbourne is now being sued by her father Ozzy's mistress Michelle Pugh after the reality star's Twitter rant which allegedly included her phone number.

Pugh is suing Kelly for intentional infliction of emotional distress, defamation and public disclosure of public facts, according to reports.

Kelly's Twitter rant came after Sharon and Ozzy temporarily split when news of his affair spread.

When Kelly slammed their hair stylist and offered out vulgar sex acts before listing a telephone number, Kelly was blasted by Twitter critics to which she responded: “Are you my family? NO YOU ARE NOT YOU HAVE NO IDEA WHAT SHE DID! So keep ur high-mighty opinions to yourself!”

Court documents, reported by E! News, state that Kelly had “intentionally and maliciously harmed her” with her Twitter rant to her 4.07 million followers.

Kelly did in fact delete the tweet but Pugh states that the “damage” was “already done”.

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Meanwhile an emotional Sharon struggled to get out her words as she appeared on The Talk on Wednesday after her husband Ozzy revealed that he was receiving treatment for a sex addiction.

The rocker's admission was the first topic of the show, and as a sympathetic Aisha Tyler turned to Sharon to find out what was going on, Sharon could barely talk as she fought back the tears.

Her co-hosts including Sara Gilbert and Sheryl Underwood all reached out to comfort her as she explained the family situation.

Sharon Osbourne breaks down over Ozzy

Sharon said it had been 'embarrassing'

Sharon was comforted by her co-hosts on The Talk

“If you don't want to talk about it you don't have to,” Aisha told her. “You don't have to say anything if you don't want to.”

“After the (Black Sabbath) tour, he goes into inpatient for three months,” Sharon explained, revealing that Ozzy had been having therapy for three months as an outpatient.

“He's working at it. It's hard because it affects the whole family. And, it's quite embarrassing to talk about.”

Sharon struggled to talk about her marital problems

Sharon opened up about Ozzy and claimed that it had been going on for six years

“Somehow drugs and drink is more acceptable I think,” Sharon said. “When it's somebody that has a sex addiction, it's embarrassing.”

“He's come out and admitted it finally. It's very, very hard,” she said. Sharon even joked that Ozzy should call Tiger Woods for advice before thanking her co-stars.

“It's been going on for at least six years,” Sharon explained before asking to change the subject.

(Image: Getty Images for MTV)

Ozzy admitted cheating on his wife Sharon with other women this week, as he undergoes "intense" therapy for sex addiction.

The Black Sabbath rocker - who recently reconciled with wife Sharon following a brief split when it was claimed he had been unfaithful with hairdresser Michelle Pugh - has apologised to the women he has been having "sexual relationships" with outside of his marriage and admitted he is "mortified" at how his conduct affected his family.

(Image: FameFlynet)

His rep told People magazine in a statement: "Over the last six years, Ozzy Osbourne has been dealing with a sex addiction. He is sorry if Ms. Pugh took their sexual relationship out of context.

"He would like to apologise to the other women he has been having sexual relationships with.

(Image: Splash)

"Out of the bad comes good. Since his relationship with Ms. Pugh was exposed, Ozzy has gone into intense therapy.

(Image: PA)

"Ozzy is mortified at what his behaviour has done to his family.

"He thanks God that his incredible wife Sharon is at his side to support him."